CN101053772A - Zone heated inlet ignited diesel particulate filter regeneration - Google Patents
Zone heated inlet ignited diesel particulate filter regeneration Download PDFInfo
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- CN101053772A CN101053772A CN 200710103530 CN200710103530A CN101053772A CN 101053772 A CN101053772 A CN 101053772A CN 200710103530 CN200710103530 CN 200710103530 CN 200710103530 A CN200710103530 A CN 200710103530A CN 101053772 A CN101053772 A CN 101053772A
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- grid
- resistance material
- particulate
- particulate filter
- zone
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- 238000011069 regeneration method Methods 0.000 title claims description 11
- 230000008929 regeneration Effects 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 229910001120 nichrome Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims 1
- 239000012811 non-conductive material Substances 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 description 16
- 239000000446 fuel Substances 0.000 description 9
- 230000008439 repair process Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 241000264877 Hippospongia communis Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Processes For Solid Components From Exhaust (AREA)
Abstract
An exhaust system that processes exhaust generated by an engine is provided. The system includes: a particulate filter (PF) that is disposed downstream of the engine and that filters particulates from the exhaust; and a grid that includes electrically resistive material that is segmented by non-conductive material into a plurality of zones and wherein the grid is applied to an exterior upstream surface of the PF.
Description
Cross-reference with relevant application
The application requires the U.S. Provisional Application No.60/786 of proposition on March 24th, 2006,062 rights and interests.The disclosed content of above-mentioned application is drawn at this and is reference.
Government rights statement
Some theme of the application is to develop according to the contract that is numbered DE-FC-04-03AL67635 that Ministry of Energy is authorized.U.S. government has certain right to the present invention.
Technical field
The present invention relates to be used for the method and system of heated particulate filter.
Background technology
Description in this part only provides background information related to the present invention, and does not constitute prior art.
Because compression ratio that diesel oil increases and high energy density, diesel engine is than the efficient height of gasoline engine usually.Usually, from diesel exhaust, filter out the particulate that is produced by the diesel combustion circulation with the particulate filter (PF) that is installed in the waste gas stream.With the passing of time, PF begins to fill, and the diesel particulation that captures must be removed.In regenerative process, diesel particulation burns in PF.
The conventional regeneration method is after main combustion incident fuel to be sprayed into waste gas to flow.Spraying into fuel accelerated combustion is to burn on one or more catalyst that place waste gas stream.The fuel liberated heat that burns on catalyst raises EGT, the soot particle of catching with this PF that burns.Yet the method can cause departing from the high temperature of expection, and these parts to gas extraction system comprise that PF is harmful to.
Summary of the invention
Therefore, provide a kind of gas extraction system of handling engine exhaust.This system comprises: a particulate filter (PF) that is installed in particulate in engine downstream and the filtering exhaust; With one comprise and be insulated the grid that material is separated into the resistance material in a plurality of zones that wherein grid is installed in the upstream outer surface of PF.
In further feature, provide a kind of by handling the gas extraction system that engine exhaust comes regeneration of particle filters.This system comprises: a particulate filter (PF) that is installed in particulate in engine downstream and the filtering exhaust; One comprises and is insulated the grid that material is separated into the resistance material in a plurality of zones, and wherein grid is installed in the upstream outer surface of PF; Be installed in a plurality of switches between power supply and each zone; With one optionally each switch of closed and disconnected power, thereby optionally heat each regional control module, wherein heating makes particulate among the PF begin regeneration.
By the description of this paper, it will be appreciated that the more applications scope.Should be understood that specification and instantiation only are used to the purpose set forth, but not are used for limiting the scope of the invention.
Description of drawings
At this, described accompanying drawing only is used to the purpose set forth, but not limits the scope of the invention by any way.
Fig. 1 is the functional block diagram that comprises the particulate filter vehicle.
Fig. 2 is the sectional view of wall stream one particulate filter.
Fig. 3 is the sectional view of part particulate filter among Fig. 2.
Fig. 4 A-4C is the leading face perspective view of particulate filter.
Fig. 5 comprises the particulate filter side view that the particulate filter circuit connects.
Fig. 6 is the functional block diagram of explanation particulate filter and power supply method of attachment.
The specific embodiment
Below explanation in fact only is used for for example, but not it is open to be used for limiting the present invention, uses or purposes.Should be appreciated that to be that all in the accompanying drawing, corresponding mark is represented same or corresponding parts and feature.Used herein, term " module " is meant a kind of special IC (ASIC), a kind of electronic circuit, a kind of processor of carrying out one or more softwares or hardware program (is shared, special use or group) and memory, combinational logic circuit, and/or other suitable parts that described function is provided.
Now, referring to Fig. 1.A kind of typical diesel engine system 10 is major electrical components consistent with the present invention.Should be appreciated that diesel engine system 10 in fact only is used for for example, and regional heated particulate filter regeneration described here can be applied in various engine systems as in the particulate filter.Such engine system can be including, but not limited to G. D. I engine system and homogeneous charge compression ignition engine system.For the ease of discussing, will be that example is set forth the present invention with the diesel engine system.
Turbocharged diesel system 10 comprises that the mixture of a combustion air and fuel produces the engine 12 of driving torque.Air enters system by the air cleaner 14 of flowing through.Air is inhaled into turbocharger 18 then by air cleaner 14.Turbocharger 18 compressions enter the fresh air of system 10.Usually, the air compression degree is big more, and the output of engine 12 is just big more.Compressed air then by aerial cooler 20 before entering inlet manifold 22.
Air in the inlet manifold 22 is assigned in the cylinder 26.Although for example understand four cylinders 26, should be realized that the system and method among the present invention is applicable to the have a plurality of cylinders engine of (including but are not limited to 2,3,4,5,6,8,10 and 12 cylinders).It should further be appreciated that the system and method among the present invention is applicable to the V-cylinder structure.With fuel injector 28 fuel is sprayed into cylinder 26.The heat that compressed air produces is lighted air/fuel mixture.The air/fuel mixture burning produces waste gas.Waste gas comes out to enter gas extraction system from cylinder 26.
Gas extraction system comprises exhaust branch pipe 30, diesel oxidation catalyst (DOC) 32, and particulate filter (PF) 34.Selectively, an EGR control valve (not shown) is got back to inlet manifold 22 with the recirculation of part waste gas.All the other waste gas are imported into turbocharger 18 to drive turbine.Turbine promotes the compression from the fresh air of air cleaner 14.Waste gas from turbocharger 18 passes through DOC 32 and PF 34.Based on the air/fuel ratio after the burning, DOC 32 is with off-gas oxidizing.Amount of oxidation raises the temperature of waste gas.PF 34 receives and filters out from the waste gas of DOC 32 and with soot particles all in the waste gas.
According to various induction informations, the regeneration of control module 44 control engines and PF.More specifically, the particulate matter deposit amount among the control module 44 estimation PF 34.When the estimation deposition reaches threshold value (as: particle matter 5g/L) and waste gas flow velocity in desired extent the time, the electric current by power supply 46 control PF 34 is to promote regenerative process.The time that regenerative process continues is based on the content of particle matter among the PF 34.The expection regenerative process can continue 4-6 minute.Yet electric current only is provided at the starting stage of regenerative process.More specifically, electric energy heating PF face in the time (as: 1-2 minute) that limits.Waste gas by leading face is heated.Utilize PF34 to be heated near the particle matter burning institute's liberated heat the face or utilize by PF heated waste gas to finish remaining regenerative process.
With reference to Fig. 2 and Fig. 3, PF 34 is preferably the overall particle grabber especially, and it comprises closed cell/passage 50 and open cell/passage 52 alternately.Unit/ passage 50,52 is typically the square-section, axially passes this parts.The wall 58 of PF 34 preferably is made up of porous cordierite ceramic honey comb wall.Should be understood to, any ceramic honeycomb material is all within limit of consideration of the present invention.Shown in 56, alternately stop up an end of adjacency channel.This forces the diesel engine suspended particulates by the porous matrix wall as mechanical filter.Particle matter is deposited in the closed channel 50, and waste gas flows out by open channel 52.Soot particle 59 flows among the PF 34, is hunted down at this.
For the regeneration purpose, make the grid 64 that comprises resistance material attached to the front end outer surface, promptly on the leading face of PF34.Power supply produces heat energy to resistance material.Should be understood that the thick film heating technique can be used to make grid 64 attached to PF 34.For example, heating material (as: silver or nichrome) can be applied and etching, perhaps on the leading face of shade attached to PF 34.In other different example, grid comprises resistance material (as stainless steel), and is attached on the PF with ceramic binder.Should be understood that also resistance material can be applied in various single channels or multi-channel type.The waste gas that passes PF 34 is carried at the heat energy that produces in the leading face passage 50,52 nearby of PF 34.The heat energy that increases is lighted the particle matter of PF 34 porch.The heat that particle burning is produced imports PF with remaining particulate among the PF that ignites.
With reference to Fig. 3, can add a heat conducting coating 72 especially at passage 50,52 inlets 62 places.Coating 72 can be extended a bit of distance to the open end of closed channel 50.In different instances, heat conducting coating extends 1 inch with interior distance in the leading face of PF.The resistance material of grid 64 contacts with heat conducting coating 72.When passing through resistance material, electric energy gives heat conducting coating 72 with thermal energy transfer.Heat from heat conducting coating 72 is lighted near the particle matter PF 34 inlets.
With reference to Fig. 4 A, 4B, and 4C, electricity can be divided into a plurality of zones with grid 64 to the influence of system in the regenerative process in order to reduce.Can heat each zone respectively by powering for the resistance material passage that is placed in each zone.Separate with insulating materials in each zone.Should be realized that, can come the leading face of PF is heated by the various multi-form zone that is separated into shown in Fig. 4 A ~ 4C.
For example, shown in Fig. 4 A,, the subregion such as PF can be divided into for the ease of vehicle assembling.Zone shown in Fig. 4 B, it forms concentric circles, can be used for simulating flow pattern.PF also can divide according to the zone shown in Fig. 4 C, wherein resistance material is disperseed more equably, to heat the working face of PF 34 more equably.This strategy minimizes heating surface, but has utilized the fact that burning is expanded during by PF 34 to adjacency channel at soot.Therefore, make the maximized while of particle matter of consumption, heating surface (area) (HS and electric energy are minimized.It should further be appreciated that, in each zone, can form various single channels and multi-channel type resistance via.
Purpose for the sake of simplicity, remainder of the present disclosure will be discussed in the scope of Fig. 4 A.Shown in Fig. 4 A, grid 64 is divided into three regional 74-76.Resistance via 77-79 is formed on the grid 64 with screw type in regional 74-76.Opened with insulating materials in 80,81 minutes in the zone.As shown in Figure 5, electric wiring terminal 86-90 lays respectively among each of three regional 74-76.Give each electric wiring terminal 86-90 power supply by insulated wire 82-84.Should be realized that each zone can be heated in order, heating simultaneously or heating as required.
With reference to Fig. 4 A, Fig. 5, and Fig. 6 are each electric wiring terminal 86-90 power supply.Control module 44 controls heat for each regional 74-76 respectively.Switch 90-94 can be closed or disconnects and allow electric current each regional 74-76 that flows through.For example, add voltage for switch 90-94 by power supply 46.Closed or disconnect each switch 90-94 by control module 44 gauge tap driving control unit 96.Can add voltage and/or electric current that another switch 98 makes inductor 100 come induction power supply 46 to supply with.This is the purpose in order to monitor.According to monitoring result, the closed or disconnection of control module 44 gauge tap 90-94.
According to the description of front, those skilled in the art can recognize that now main instruction of the present disclosure can be used with different forms.Therefore, although the disclosure illustrates in conjunction with instantiation that at this actual range of the present disclosure is not limited thereto, because for a person skilled in the art, by studying accompanying drawing, specification and following claims carefully, other alter mode will be conspicuous.
Claims (18)
1, a kind of gas extraction system of handling engine exhaust comprises:
A particulate filter (PF) that is installed in particulate in engine downstream and the filtering exhaust; With
One comprises the grid that is separated into the resistance material in a plurality of zones with insulating materials, and wherein grid is installed in the upstream outer surface of PF.
2, the system as claimed in claim 1 further comprises a plurality of circuit of optionally powering for the resistance material that is arranged in a plurality of zones.
3, the system as claimed in claim 1 wherein utilizes the thick film heating that resistance material is installed in PF upstream outer surface.
4, the system as claimed in claim 1, resistance material comprise silver and nichrome at least a.
5, the system as claimed in claim 1, particulate filter comprise a conductive coating that is coated in PF upstream outer surface, and wherein the resistance material of grid contacts with conductive coating, and resistance material takes fire the particulate on the PF surface to the conductive coating heat transfer.
6, the system as claimed in claim 1, wherein particulate filter comprises a wall one particle capture device with a plurality of open channels and a plurality of closed channels.
7, system as claimed in claim 6, wherein particulate filter comprises a conductive coating that is coated in a plurality of openings and closed channel porch, wherein conductive coating extends to the upstream portion of open channel, and resistance material takes fire the particulate in the PF upstream portion to the conductive coating heat transfer.
8, the system as claimed in claim 1, wherein in each zone of grid, the resistance material passage forms single channel type.
9, the system as claimed in claim 1, wherein in each zone of grid, the resistance material passage forms multi-channel type.
10, a kind ofly handle the gas extraction system that engine exhaust makes particulate filter regeneration, comprising:
A particulate filter (PF) that is installed in particulate in engine downstream and the filtering exhaust;
One comprises the grid that is separated into the resistance material in a plurality of zones with insulating materials, and wherein grid is installed in the upstream outer surface of PF;
Be installed in a plurality of switches between power supply and a plurality of zone; And
One optionally each switch of closed and disconnected power, thereby optionally heat each regional control module, wherein heating makes particulate among the PF begin regeneration.
11, system as claimed in claim 10 comprises that further an inductor comes at least a of voltage and current that induction power supply supplies with, and wherein, control module is according at least a monitoring power supply of the voltage and current of sensing.
12, system as claimed in claim 11, wherein, control module is monitored optionally each switch of closed and disconnected according to power supply.
13, system as claimed in claim 10, wherein, at the starting stage of PF regeneration cycle control module each switch of closed and disconnected optionally.
14, system as claimed in claim 13, the amount of particulate is powered when particulate loading surpasses threshold value among the control module estimation PF.
15, system as claimed in claim 10, wherein in each zone of grid, the resistance material passage forms single channel type.
16, system as claimed in claim 10, wherein in each zone of grid, the resistance material passage forms multi-channel type.
17, method as claimed in claim 10, wherein grid is separated into the first area that is positioned at the center and is positioned at least one perimeter concentric with it.
18, method as claimed in claim 10, grid such as are split at the subregion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78606206P | 2006-03-24 | 2006-03-24 | |
| US60/786062 | 2006-03-24 | ||
| US11/561100 | 2006-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101053772A true CN101053772A (en) | 2007-10-17 |
Family
ID=38793929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710103530 Pending CN101053772A (en) | 2006-03-24 | 2007-03-26 | Zone heated inlet ignited diesel particulate filter regeneration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101053772A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678385A (en) * | 2012-05-25 | 2012-09-19 | 华南理工大学 | Exhaust waste heat power generation and exhaust purification system based on Stirling generator |
| CN103119259A (en) * | 2010-09-15 | 2013-05-22 | 依米泰克排放技术有限公司 | Brueck rolf [de]; hodgson jan [de]; vorsmann christian [de] |
-
2007
- 2007-03-26 CN CN 200710103530 patent/CN101053772A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103119259A (en) * | 2010-09-15 | 2013-05-22 | 依米泰克排放技术有限公司 | Brueck rolf [de]; hodgson jan [de]; vorsmann christian [de] |
| CN103119259B (en) * | 2010-09-15 | 2015-06-10 | 依米泰克排放技术有限公司 | Power device for parts of exhaust system |
| US9893505B2 (en) | 2010-09-15 | 2018-02-13 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Configuration for a power supply of a component in an exhaust gas system |
| CN102678385A (en) * | 2012-05-25 | 2012-09-19 | 华南理工大学 | Exhaust waste heat power generation and exhaust purification system based on Stirling generator |
| CN102678385B (en) * | 2012-05-25 | 2014-11-12 | 华南理工大学 | Exhaust waste heat power generation and exhaust purification system based on Stirling generator |
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Application publication date: 20071017 |